Question

求解答简便计算

Answer 1

原式=999*222+333*333+333
=999*222+333*3*111+333
=999*（222+111）+333
=999*333+333
=1000*333
=333000

Answer 2

求解答简便计算
(1)(7/8+1/6-2/3)x24
=(7/8)x24+(1/6)x24-(2/3)x24
=7x3+1x4-2x8
=21+4-16
=25-16
=9
(2)2.5x(3.6+3.6+3.6+3.6)
=2.5x3.6x4
=2.5x4x3.6
=10x3.6
=36
(3)999x222+333x334
=333x3x222+333x334
=333x666+333x334
=333x(666+334)
=333x1000
=333000
(4)原式=0.5+1+（2/13）+2+0.5+（7/13）
=0.5+0.5+1+2+（2/13）+（7/13）
=1+1+2+（2/13）+（7/13）
=2+2+（9/13）
=4+（9/13）
=（4x13+9)/13
=（52+9)/13
=61/13