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人教版四年级数学下册加法运算定律练习题72

830 +240 =240 +____90 +____ =23 +____( 55 +43 ) +27 =55 +( ____ +____ )390 +( 210 +92 ) =( 390 +____ ) +________ +64 =64 +21t +57 =57 +____二、下面各题怎样简便怎样计算。

20 +22 +68 45 +86 +2564 +65 +36 +935 220 +40 +560 +680726 +26 +274 55 +560 +2515 +75 +85 +25 223 +899635 -499 240 +180 +520 +760940 +310 =310 +____86 +____ =24 +____( 29 +40 ) +50 =29 +( ____ +____ )310 +( 690 +44 ) =( 310 +____ ) +________ +52 =52 +32b +64 =64 +____二、下面各题怎样简便怎样计算。

30 +24 +56 45 +34 +1547 +63 +53 +537 100 +210 +490 +500 454 +11 +889 26 +469 +2450 +71 +50 +29 628 +699978 +399 180 +420 +180 +320580 +160 =160 +____70 +____ =20 +____( 50 +24 ) +46 =50 +( ____ +____ )180 +( 420 +10 ) =( 180 +____ ) +________ +65 =65 +13t +85 =85 +____二、下面各题怎样简便怎样计算。

77 +10 +80 67 +34 +2386 +63 +14 +137 280 +250 +750 +320 960 +18 +382 26 +608 +2450 +80 +50 +20 333 +899637 -99 260 +310 +290 +340600 +490 =490 +____68 +____ =29 +____( 26 +16 ) +74 =26 +( ____ +____ )470 +( 130 +41 ) =( 470 +____ ) +________ +68 =68 +36d +75 =75 +____二、下面各题怎样简便怎样计算。

95 +42 +18 50 +43 +1017 +70 +83 +30 290 +50 +850 +610557 +37 +863 43 +964 +2726 +74 +74 +26 491 +799845 -299 250 +80 +920 +350540 +190 =190 +____82 +____ =13 +____( 42 +33 ) +47 =42 +( ____ +____ )300 +( 600 +63 ) =( 300 +____ ) +________ +95 =95 +23t +53 =53 +____二、下面各题怎样简便怎样计算。

91 +38 +52 61 +19 +2912 +51 +88 +449 120 +370 +330 +480 982 +90 +10 28 +456 +2277 +50 +23 +50 101 +899861 -499 240 +430 +270 +760540 +210 =210 +____76 +____ =39 +____( 27 +14 ) +76 =27 +( ____ +____ )200 +( 600 +64 ) =( 200 +____ ) +________ +86 =86 +42b +78 =78 +____二、下面各题怎样简便怎样计算。

79 +29 +51 40 +31 +3078 +52 +22 +348 290 +240 +660 +510 135 +68 +432 65 +566 +1537 +67 +63 +33 515 +299630 -499 120 +150 +650 +780830 +360 =360 +____68 +____ =44 +____( 85 +48 ) +32 =85 +( ____ +____ )270 +( 630 +16 ) =( 270 +____ ) +________ +77 =77 +25n +44 =44 +____二、下面各题怎样简便怎样计算。

50 +23 +37 29 +79 +2158 +69 +42 +931 130 +410 +390 +670 726 +37 +463 70 +523 +1072 +78 +28 +22 459 +599823 -199 160 +100 +600 +840850 +460 =460 +____94 +____ =35 +____( 35 +21 ) +49 =35 +( ____ +____ )340 +( 260 +78 ) =( 340 +____ ) +____ ____ +61 =61 +12t +76 =76 +____二、下面各题怎样简便怎样计算。

42 +31 +39 62 +15 +2835 +77 +65 +923 260 +60 +740 +240 393 +28 +472 69 +540 +2169 +77 +31 +23 540 +699694 -99 300 +90 +810 +100660 +470 =470 +____72 +____ =37 +____( 54 +38 ) +42 =54 +( ____ +____ )310 +( 290 +57 ) =( 310 +____ ) +________ +79 =79 +45y +69 =69 +____二、下面各题怎样简便怎样计算。

55 +21 +39 34 +45 +2625 +60 +75 +940 290 +20 +780 +610 162 +98 +802 44 +737 +2669 +71 +31 +29 797 +599780 -299 130 +70 +930 +270560 +430 =430 +____68 +____ =37 +____( 74 +22 ) +68 =74 +( ____ +____ )330 +( 370 +29 ) =( 330 +____ ) +________ +78 =78 +32a +20 =20 +____二、下面各题怎样简便怎样计算。

13 +20 +40 84 +22 +1684 +54 +16 +246 220 +490 +210 +180 708 +99 +901 59 +603 +2188 +71 +12 +29 821 +299797 -399 150 +90 +510 +650820 +230 =230 +____95 +____ =48 +____( 30 +45 ) +25 =30 +( ____ +____ )210 +( 490 +62 ) =( 210 +____ ) +________ +85 =85 +39m +83 =83 +____二、下面各题怎样简便怎样计算。

23 +16 +44 65 +55 +2530 +61 +70 +939 180 +430 +370 +420 472 +54 +546 65 +635 +2539 +74 +61 +26 283 +599607 -599 190 +500 +100 +710990 +370 =370 +____87 +____ =47 +____( 37 +19 ) +81 =37 +( ____ +____ )480 +( 120 +83 ) =( 480 +____ ) +________ +83 =83 +26m +42 =42 +____二、下面各题怎样简便怎样计算。

90 +33 +57 85 +67 +1550 +52 +50 +948 280 +190 +610 +220 933 +56 +344 66 +963 +1485 +70 +15 +30 898 +499846 -199 300 +180 +520 +500940 +360 =360 +____89 +____ =48 +____( 63 +12 ) +78 =63 +( ____ +____ )120 +( 480 +72 ) =( 120 +____ ) +________ +59 =59 +46s +29 =29 +____二、下面各题怎样简便怎样计算。

38 +43 +47 81 +73 +1944 +55 +56 +345 130 +400 +300 +770 571 +53 +747 47 +541 +2371 +53 +29 +47 785 +899664 -499 250 +150 +450 +550740 +340 =340 +____60 +____ =44 +____( 59 +25 ) +75 =59 +( ____ +____ )410 +( 190 +84 ) =( 410 +____ ) +________ +82 =82 +26s +30 =30 +____二、下面各题怎样简便怎样计算。

51 +22 +78 50 +26 +3036 +68 +64 +932 260 +300 +700 +540 132 +76 +724 60 +679 +2064 +79 +36 +21 125 +699929 -99 260 +190 +410 +540690 +170 =170 +____60 +____ =23 +____( 28 +20 ) +60 =28 +( ____ +____ )300 +( 400 +33 ) =( 300 +____ ) +________ +93 =93 +27t +31 =31 +____二、下面各题怎样简便怎样计算。

43 +39 +31 60 +78 +2019 +51 +81 +849 210 +300 +600 +390 785 +17 +483 51 +982 +2986 +55 +14 +45 194 +699699 +99 210 +200 +400 +390910 +380 =380 +____76 +____ =22 +____( 74 +22 ) +68 =74 +( ____ +____ )490 +( 310 +36 ) =( 490 +____ ) +________ +99 =99 +26t +94 =94 +____二、下面各题怎样简便怎样计算。

93 +11 +59 67 +62 +1381 +79 +19 +721 110 +80 +720 +390362 +78 +222 33 +304 +1757 +71 +43 +29 143 +299816 +499 220 +200 +700 +680500 +410 =410 +____65 +____ =35 +____( 16 +16 ) +54 =16 +( ____ +____ )130 +( 570 +24 ) =( 130 +____ ) +________ +79 =79 +39m +84 =84 +____二、下面各题怎样简便怎样计算。

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