43.5×7.5+43.5×2.6-435 巧算

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43.5×7.5+43.5×2.6-435 巧算
43.5×7.5+43.5×2.6-435 巧算

43.5×7.5+43.5×2.6-435 巧算
43.5×7.5+43.5×2.6-435=
43.5×7.5+43.5×2.6-43.5x10=
43.5x(7.5+2.6-10)=
43.5x0.1=
4.35

43.5×7.5+43.5×2.6-435
=43.5×(7.5+2.6-10)
=43.5×0.1
=4.35

43.5×7.5+43.5×2.6-435
=43.5×7.5+43.5×2.6-43.5×10
=43.5×(7.5+2.6-10)
=43.5×(10.1-10)
=43.5×0.1=4.35