9.05乘28加9.05乘72-搜答案-智慧作业帮

72*55+28*56=72*(56-1)+28*56=72*56-72+28*56=(72+28)*56-72=100*56-72=5600-72=5528同样,你把后面的56变成（55+1）也可以

25x(56+72)x125=25x128x125=25x4x4x8x125=(25x4)x4x(8x125)=100x4x1000=400x1000=400000

36×56+72×22=36×2×28﹢36×2×22=36×2×﹙28+22）=36×2×50=3600

0.9乘8.4加1乘0.84=9×0.84+0.84=（9+1）×0.84=10×0.84=8.472乘1.25=9*（8*1.25）=9*10=900.36乘2.4加76乘0.036=0.36×2.

56*24+52*44+28*56=56*24+28*56+52*44=56*（24+28）+52*44=56*52+52*44=52*（56+44）=52*100=5200

（38）×49+72×51+34×49=7200.

36*56+72*22=36*56+36*2*22=36(56+44)=3600

1)258乘72加72=258x72乘142=260x72=187202)887乘125-27乘125=(887-27)x125=1075003)45乘35+56乘35-3535x100=35004)

97+3)x9=900

14x44+12x28+32x14=14x44+24x14+32x14=14x(44+24+32)=14x100=1400

您好：72乘15加24乘29加24乘26=72x15+24x(29+26)=72x15+24x54=72x15+24x3x18=72x(15+18)=72x33=72x30+72x3=2160+216

316x72+28x316=316x(72+28)=316x100=31600

答案是9再问：过程再答：1×3×24+2×6×48+3×9×72=9×(1×2×4+2×4×8+3×6×12)再答：约分即可再答：分子每一个都是分母相应项的9倍再问：.....再问：要过程。再答：1×

=12.5×69+(53+72)×3.1=125×6.9+125×3.1=125×(69+31)=125×100=1250

72*38+28*38=38*(72+28)=38*100=3800

2.61*39.5+0.7*261+9.05*26.1=26.1*3.95+26.1*7+26.1*9.05=26.1*(3.95+7+9.05)=26.1*20=522

68*72+31*72+23*72=（68+31+23）*72=122*72=100*72+20*72+2*72=7200+1440+144=8784

72*49+49*28=49*(72+28)=49*100=4900

=23×2×28+23×4×32+23×16=23×56+23×128+23×16=23×(56+128+16)=23×200=4600