Question

5.2×(4.7-1.9)有简便方法吗?

Answer 1

5.2×(4.7-1.9)有简便方法吗?

没有简便方法
5.2×(4.7-1.9)
=5.2x2.8
=14.56
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0.68+1.9-0.32+1.9有简便方法吗

0.68+1.9-0.32+1.9有简便方法吗
解：采用结合律，
原式=（0.68-0.32）+（1.9+1.9）
=0.36+3.8
=4.16

(1.9+1.9+1.9+1.9)x20有简便方法吗!

(1.9+1.9+1.9+1.9)x20 =1.9x4x20 =1.9x80 =19x8 =152

5.2×1.4-5.62有简便方法吗?

5.2×1.4-5.62有简便方法吗?
5.2×1.4-5.62
=7.28-5.62
=1.66
直接计算

0.78 +5.2*3.4有简便的方法吗

0.78 +5.2*3.4
=0.78+2*(2.6*3.4)
=0.78+2*(3-0.4)(3+0.4)
=0.78+2*(9-0.16)
=0.78+18-0.32
=18.46

0.85×4.7×4这个题有简便方法吗?

0.85×4.7×4
=0.85x2x2x4.7
=1.7x9.4
=1.7x10-1.7x0.6
=17-1.02
=15.98
希望能帮到你

50.4*1.9-1.8以及3.76*0.25+25.8有简便方法吗

解，
50.4*1.9-1.8
=50.4*2-5.04-1.8
=50*2+0.4*2-5.04-1.8
=100-6.04
=93.96
3.76*0.25+25.8
=4*0.25-0.04*0.25+25.8
=1-0.01+25.8
=26.7

0.58x4.8+0.52x5.2有简便方法吗

0.58x4.8+0.58x5.2
=0.58x（4.8+5.2）
=0.58x10
=5.8

有简便方法吗

没