每瓶雪碧饮料2.5元,每箱24瓶,明明家要买4箱雪碧饮料,一共需要多少钱?
练习课
1.25×3.7×8=1.25×8×3.7=10×3.7=370.25×2.8×4=0.25×4×2.8=1×2.8=2.8
0.25×3.2×1.25=0.25×4×0.8×1.25=(0.25×4)×(0.8×1.25)=1×1=1
0.25×4.8
8.7×10.1=8.7×(10+0.1)=8.7×10+8.7×0.1=87+0.878.7×9.9=8.7×(10-0.1)=87.87=8.7×10-8.7×0.1=87-0.87=86.13
6.8×101-6.8=6.8×101-6.8×1=6.8×(101-1)=6.8×1006.8×10.1-0.68=6.8×10.1-6.8×0.1=6.8×(10.1-0.1)=6.8×10=680=68
3.86×47+38.6×5.3=38.6×4.7+38.6×5.3=38.6×(4.7+5.3)=38.6×10=386
①0.125×4.7×8②7.3×10.1③7.3×0.9
④2.5×2.4⑤8.3×10.9-8.3×0.9⑥3.82×9.9+0.382
⑦3.45×3.6+0.345×64⑧9.6×2.4+9.6×7.5+0.96提高题:
再见!!