整理与练习(2)
1: 0.6 0.6 21
103 30 2.4
2: 5.6÷0.1——5.6×10
4.9×0.1——4.9÷10
3.8×0.5——3.8÷2
4.4÷0.5——4.4×2
5÷0.25——5×4
3: < <
> >
< =
3: 7.98+2.96+1.02 5.95÷﹙1.2+0.5﹚×5
= (7.98+1.02) +2.96 = 5.95÷1.7×5
= 9+2.96 = 3.5×5
= 11.96 = 17.5
6.32×0.9+6.32×0.1 5.4×[﹙1.3+2.15﹚÷0.5]
= 6.32×(0.9+0.1) = 5.4×[3.45÷0.5]
= 6.32×1 = 5.4×6.9
= 6.32 = 37.26
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