脱式计算. (1)45×(67+43) (2)3.68÷4.6+6.32 (3)72
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/04/29 03:50:02
脱式计算.
(1)45×(67+43) | (2)3.68÷4.6+6.32 | (3)
(1)45×(67+43)
=45×110 =4950; (2)3.68÷4.6+6.32 =0.8+6.32 =7.12; (3) 7 2÷ 5 9× 5 14 = 7 2× 9 5× 5 14 = 9 4; (4)1.8×(4.7-3.87÷0.9) =1.8×(4.7-4.3) =1.8×0.4 =0.72; (5) 1 5+( 1 4- 3 10× 2 3) = 1 5+( 1 4- 1 5) = 1 5- 1 5+ 1 4 = 1 4; (6)36÷[( 5 6- 1 3)×3] =36÷[ 1 2×3] =36÷ 3 2 =24. |