3 运动定律与简便运算
用简便方法计算
9﹣(+) 1.8×+2.2×25% 6.9×99+6.9 67×101
2.5×32×0.125 ﹣+﹣ 10000÷125÷8 105×(++)
计算,能用简便计算就用简便计算.
(1)4.2﹣1.38+5.8﹣3.62
(2)
(3)
(4)0.125×0.25×32
(5)
(6)99.8×98+99.8×102.
用简便方法计算
9﹣(+) 1.8×+2.2×25% 6.9×99+6.9 67×101
2.5×32×0.125 ﹣+﹣ 10000÷125÷8 105×(++)
计算,能用简便计算就用简便计算.
(1)4.2﹣1.38+5.8﹣3.62
(2)
(3)
(4)0.125×0.25×32
(5)
(6)99.8×98+99.8×102.