作业帮4.23*1.08+0.423*9.2和9.8*3.6+0.1*7.2用递等式简便计算
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4.23*1.08+0.423*9.2和9.8*3.6+0.1*7.2用递等式简便计算
4.23*1.08+0.423*9.2和9.8*3.6+0.1*7.2用递等式简便计算
4.23*1.08+0.423*9.2和9.8*3.6+0.1*7.2用递等式简便计算
1、4.23x（1.08+0.92）（0.423增大十倍,9.2缩小十倍）
2、7.2x(4.9+0.1) （3.6和7.2是倍数,3.6增大两倍,相乘的9.2缩小两倍）
4.23×1.08+0.423×9.2 9.8×3.6+0.1×7.2
=0.423×10.8+0.423×9.2 =9.8×3.6+0.1×3.6×2
=0.423×10.8+0.423×9.2 =9.8×3.6+0.1×3.6×2
=0.423×(10.8+9.2) =3.6×(...
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4.23×1.08+0.423×9.2 9.8×3.6+0.1×7.2
=0.423×10.8+0.423×9.2 =9.8×3.6+0.1×3.6×2
=0.423×10.8+0.423×9.2 =9.8×3.6+0.1×3.6×2
=0.423×(10.8+9.2) =3.6×(9.8+0.2)
=0.423×20 =3.6×10
=8.46 =36
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4.23×1.08+0.423×9.2
=0.423×10.8+0.423×9.2
=0.423×(10.8+9.2)
=0.423×20
=8.46
=4.23×1.08+4.23×0.92
=4.23×(1.08+0.92)
=4.23×2
=8.46
4.23*1.08+0.432*9.2
=(1.08+0.92)*4.23
=2*4.23
=8.46
4.23×1.08+0.423×9.2 9.8×3.6+0.1×7.2
=0.423×10.8+0.423×9.2 =9.8×3.6+0.1×3.6×2
=0.423×10.8+0.423×9.2 =9.8×3.6+0.1×3.6×2
=0.423×(10.8+9.2) =3.6×(...
全部展开
4.23×1.08+0.423×9.2 9.8×3.6+0.1×7.2
=0.423×10.8+0.423×9.2 =9.8×3.6+0.1×3.6×2
=0.423×10.8+0.423×9.2 =9.8×3.6+0.1×3.6×2
=0.423×(10.8+9.2) =3.6×(9.8+0.2)
=0.423×20 =3.6×10
=8.46 =36
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4.23×1.08+0.423×9.2
=0.423×10.8+0.423×9.2
=0.423×(10.8+9.2)
=0.423×20
=8.46
4.23×1.08+0.423×9.2
=0.423×10.8+0.423×9.2
=0.423×(10.8+9.2)
=0.423×20
=8.46