4.2×2.6+1.3×1.5+6.3×0.1的简便运算?
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4.2ⅹ2.6+1.3x1.5+6.3x0.1
=8.4x1.3+1.3x1.5+6.3x0.1
=1.3x(8.4+1.5)+6.3x0.1
=1.3x9.9+6.3x0.1
=1.3x(10一0.1)+6.3x0.1
=1.3x10一1.3x0.1+6.3x0.1
=13+0.1x(6.3一1.3)
=13+0.1x5
=13+0.5
=13.5。
=8.4x1.3+1.3x1.5+6.3x0.1
=1.3x(8.4+1.5)+6.3x0.1
=1.3x9.9+6.3x0.1
=1.3x(10一0.1)+6.3x0.1
=1.3x10一1.3x0.1+6.3x0.1
=13+0.1x(6.3一1.3)
=13+0.1x5
=13+0.5
=13.5。
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4.2×2.6+1.3×1.5+6.3×0.1的简便运算?
4.2×2.6+1.3×1.5+6.3×0.1
=10.92+1.95+0.63
=13.5
4.2×2.6+1.3×1.5+6.3×0.1
=10.92+1.95+0.63
=13.5
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原式=4.2x2x1.3+1.3x1.5+(5+1.3)x0.1
=8.4x1.3+1.3x1.5+0.5+1.3x0.1
=1.3x(8.4+1.5+0.1)+0.5
=1.3x10+0.5
=13+0.5
=13.5
=8.4x1.3+1.3x1.5+0.5+1.3x0.1
=1.3x(8.4+1.5+0.1)+0.5
=1.3x10+0.5
=13+0.5
=13.5
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