简算34.5×49.87
简算34.5×49.87 -
解：34.5×49.87 =（35-0.5）x(50-0.13)=1750-35x0.13-25+0.065 =1725+0.065-(30+5)x0.13 =1725.065-3.9-0.65 =1725.065-4.55 =1720.515
=34.5×（49.87+40.13）34.5×90 =3105
解：34.5×49.87 =（35-0.5）x(50-0.13)=1750-35x0.13-25+0.065 =1725+0.065-(30+5)x0.13 =1725.065-3.9-0.65 =1725.065-4.55 =1720.515
=34.5×（49.87+40.13）34.5×90 =3105
34.5x49.87 = 1720.515 直接计算没有简算，
简算34.5×49.87+34.5x50.13 =34.5x（49.87+50.13）34.5x100 =3450 86.9x10.1 =86.9x10+86.9x0.1 =869+8.69 =877.69 27x0.125x8 =27x（0.125x8）27x1 =27
数学简算题 -
34.5 × 49.87 +34.5 × 50.13 = 34.5×（49.87 + 50.13） 34.5× 100 = 3450
34.5乘49.87+3.45乘501.3 =34.5×49.87+34·5×50·13 =34.5×(49.87+50·13)=34.5×100 =3450
34.5乘49.87+3.45乘501.3怎么简算 -
34.5乘49.87+3.45乘501.3 =34.5×49.87+34·5×50·13 =34.5×(49.87+50·13)=34.5×100 =3450