问题 解答题
口算.
1.25×8=
0.4×1.5=1.2×0.7=0.6×1.3=
2.25×8=0.4×2.5=2.2×0.7=0.6×2.3=
3.25×8=0.4×3.5=3.2×0.7=0.6×3.3=
4.25×8=0.4×4.5=4.2×0.7=0.6×4.3=
答案

1.25×8=100.4×1.5=0.61.2×0.7=0.840.6×1.3=0.78
2.25×8=180.4×2.5=12.2×0.7=1.540.6×2.3=1.38
3.25×8=260.4×3.5=1.43.2×0.7=2.240.6×3.3=1.98
4.25×8=340.4×4.5=1.84.2×0.7=2.940.6×4.3=2.58

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