帮咱做下题.简便运算(梯等式):
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:2024/11/18 04:02:56
帮咱做下题.简便运算(梯等式):
1、(7/35+5/28)×35×28 2、4/7×0.75+5/7÷1/5 3、1/5×3.7+5.3+5/77+1/5 4、0.125×0.25×320 5、(2.8×1.8×4)÷(3/5×1.4×1/2) 6、6×1/4+13÷4-18×0.25 7、(一又7/25+二又5/12-1/2)×24 8、0.25×(4/5×162.2+2.8×0.8) 9、(一又1/4+1.1+1.75+9/10)÷1/2 10、一又2/3×[七又5/6+(4.375-四又3/8)-四又5/6]
1、(7/35+5/28)×35×28 2、4/7×0.75+5/7÷1/5 3、1/5×3.7+5.3+5/77+1/5 4、0.125×0.25×320 5、(2.8×1.8×4)÷(3/5×1.4×1/2) 6、6×1/4+13÷4-18×0.25 7、(一又7/25+二又5/12-1/2)×24 8、0.25×(4/5×162.2+2.8×0.8) 9、(一又1/4+1.1+1.75+9/10)÷1/2 10、一又2/3×[七又5/6+(4.375-四又3/8)-四又5/6]
帮咱做下题.简便运算(梯等式):
1、(7/35+5/28)×35×28
=7/35×35×28+5/28×35×28
=7×28+5×35
=196+175
=371
2、4/7×0.75+5/7÷1/5
=4/7×3/4+5/7×5
=3/7+25/7
=4
3、1/5×3.7+5.3×1/5+1/5
=1/5×(3.7+5.3+1)
=1/5×10
=2
4、0.125×0.25×320
=(0.125×8)×(0.25×40)
=1×10
=10
5、(2.8×1.8×4)÷(3/5×1.4×1/2)
=(2.8÷1.4)×(1.8÷3/5)×(4÷1/2)
=2×3×8
=48
6、6×1/4+13÷4-18×0.25
=(6+13-18)×1/4
=1×1/4
=1/4
7、(一又7/25+二又5/12-1/2)×24
=1又7/25×24+2又5/12×24-1/2×24
=30又18/25+58-12
=76又18/25
8、0.25×(4/5×162.2+2.8×0.8)
=0.25×4/5×(162.2+2.8)
=1/5×165
=33
9、(一又1/4+1.1+1.75+9/10)÷1/2
=【(1又1/4+1.75)+(1.1+9/10)】×2
=【3+2】×2
=5×2
=10
10、一又2/3×[七又5/6+(4.375-四又3/8)-四又5/6]
=5/3×[7又5/6-4又5/6]
=5/3×3
=5
1、(7/35+5/28)×35×28
=7/35×35×28+5/28×35×28
=7×28+5×35
=196+175
=371
2、4/7×0.75+5/7÷1/5
=4/7×3/4+5/7×5
=3/7+25/7
=4
3、1/5×3.7+5.3×1/5+1/5
=1/5×(3.7+5.3+1)
=1/5×10
=2
4、0.125×0.25×320
=(0.125×8)×(0.25×40)
=1×10
=10
5、(2.8×1.8×4)÷(3/5×1.4×1/2)
=(2.8÷1.4)×(1.8÷3/5)×(4÷1/2)
=2×3×8
=48
6、6×1/4+13÷4-18×0.25
=(6+13-18)×1/4
=1×1/4
=1/4
7、(一又7/25+二又5/12-1/2)×24
=1又7/25×24+2又5/12×24-1/2×24
=30又18/25+58-12
=76又18/25
8、0.25×(4/5×162.2+2.8×0.8)
=0.25×4/5×(162.2+2.8)
=1/5×165
=33
9、(一又1/4+1.1+1.75+9/10)÷1/2
=【(1又1/4+1.75)+(1.1+9/10)】×2
=【3+2】×2
=5×2
=10
10、一又2/3×[七又5/6+(4.375-四又3/8)-四又5/6]
=5/3×[7又5/6-4又5/6]
=5/3×3
=5