题目内容
【题目】简便计算.
8.9+8.9×99 0.25×1.3×4 2.47+5.66+7.53
【答案】890; 1.3; 15.66
【解析】
8.9+8.9×99
=8.9×(99+1)
=8.9×100
=890
0.25×1.3×4
=0.25×4×1.3
=1×1.3
=1.3
2.47+5.66+7.53
=(2.47+7.53)+5.66
=10+5.66
=15.66
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题目内容
【题目】简便计算.
8.9+8.9×99 0.25×1.3×4 2.47+5.66+7.53
【答案】890; 1.3; 15.66
【解析】
8.9+8.9×99
=8.9×(99+1)
=8.9×100
=890
0.25×1.3×4
=0.25×4×1.3
=1×1.3
=1.3
2.47+5.66+7.53
=(2.47+7.53)+5.66
=10+5.66
=15.66