0.63x2.6 + 0.37x7.4的简便计算法?
3个回答
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答:0.63x2.6 + 0.37x7.4
=0.63x(3-0.4) +(0.4-0.03)x7.4
=1.89-0.252+2.96-0.222
=2-0.11+3-0.04-0.474
=5-0.624
=4.376
或:
0.63x2.6 + 0.37x7.4
=(1-0.37)x2.6 +0.37x7.4
=2.6+0.37*(7.4-2.6)
=2.6+0.37*4.8
=2.6+0.37*5-0.37*0.2
=2.6+1.85-0.074
=2.6+1.776
=4.376
=0.63x(3-0.4) +(0.4-0.03)x7.4
=1.89-0.252+2.96-0.222
=2-0.11+3-0.04-0.474
=5-0.624
=4.376
或:
0.63x2.6 + 0.37x7.4
=(1-0.37)x2.6 +0.37x7.4
=2.6+0.37*(7.4-2.6)
=2.6+0.37*4.8
=2.6+0.37*5-0.37*0.2
=2.6+1.85-0.074
=2.6+1.776
=4.376
展开全部
0.63x2.6 + 0.37x7.4的简便计算法:
0.63x2.6 + 0.37x7.4
=0.63x(3-0.4) +(0.4-0.03)x7.4
=1.89-0.252+2.96-0.222
=2-0.11+3-0.04-0.474
=5-0.624
=4.376
0.63x2.6 + 0.37x7.4
=0.63x(3-0.4) +(0.4-0.03)x7.4
=1.89-0.252+2.96-0.222
=2-0.11+3-0.04-0.474
=5-0.624
=4.376
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0.63+0.37×2.6×7.4
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