脱式计算.3.7×99+3.7 9.6-11÷7+17
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/24 01:17:02
脱式计算. 3.7×99+3.7 | 9.6-11÷7+
(1)3.7×99+3.7,
=3.7×(99+1), =3.7×100, =370; (2)9.6-11÷7+ 1 7×4, =9.6-11× 1 7+ 1 7×4, =9.6-(11-4)× 1 7, =9.6-7× 1 7, =9.6-1, =8.6; (3)12×[( 11 6- 2 3)×3], =12×[ 11 6×3- 2 3×3], =12×[ 11 2−2], =12×3.5, =42; (4)12×( 3 7+ 1 6- 1 3), =12× 3 7+12× 1 6-12× 1 3, = 36 7+2-4, =3 1 7. |