5道简算怎么写？
2个回答
展开全部
12.5×9.7-12.5×8.7
=12.5×（9.7-8.7）
=12.5×1
=12.5
103×0.24
=（100+3）×0.24
=100×0.24+3×0.24
=24+0.72
=24.72
22.87-3.03×5.5
=22.87-16.665
=6.205
1.25×6.4×2.7
=1.25×（0.8×8）×2.7
=（1.25×0.8）×（8×2.7）
=1×21.6
=21.6
56.2×0.64+5.62×3.6
=56.2×0.64+56.2×0.36
=56.2×（0.64+0.36）
=56.2×1
=56.2
=12.5×（9.7-8.7）
=12.5×1
=12.5
103×0.24
=（100+3）×0.24
=100×0.24+3×0.24
=24+0.72
=24.72
22.87-3.03×5.5
=22.87-16.665
=6.205
1.25×6.4×2.7
=1.25×（0.8×8）×2.7
=（1.25×0.8）×（8×2.7）
=1×21.6
=21.6
56.2×0.64+5.62×3.6
=56.2×0.64+56.2×0.36
=56.2×（0.64+0.36）
=56.2×1
=56.2
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