求教数学题,列综合算式并用递等式计算
1.45→+15→x8→÷24→?算式:2.?→+23→x3→+190→586算式:3.?→÷23→÷13→-51→34算式:4.?→-9→x9→+9→÷9→9算式:递等...
1.45→+15→x8→÷24→?
算式:
2.?→+23→x3→+190→586
算式:
3.?→÷23→÷13→-51→34
算式:
4.?→-9→x9→+9→÷9→9
算式:
递等式计算,能巧算的要巧算:
1.『80800-900』÷425=?
2.『1850+1690』÷『47+12.』=?
3.72x125=? 展开
算式:
2.?→+23→x3→+190→586
算式:
3.?→÷23→÷13→-51→34
算式:
4.?→-9→x9→+9→÷9→9
算式:
递等式计算,能巧算的要巧算:
1.『80800-900』÷425=?
2.『1850+1690』÷『47+12.』=?
3.72x125=? 展开
1个回答
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1.45→+15→x8→÷24→?
算式:(45+15)x8÷24
=60x8÷24
=20
2.?→+23→x3→+190→586
算式:(586-190)÷3-23
=369÷3-23
=132-23
=109
3.?→÷23→÷13→-51→34
算式:(34+51)x13x23
=85x13x23
=25415
4.?→-9→x9→+9→÷9→9
算式:(9x9-9)÷9+9
=72÷9+9
=8+9
=17递等式计算,能巧算的要巧算:
1.(80800-900)÷425
=79900÷425
=188
2.(1850+1690)÷(47+12)
=3540÷59
=60
3. 72x125
=9x8x125
=9x(8x125)
=9x1000
=9000
算式:(45+15)x8÷24
=60x8÷24
=20
2.?→+23→x3→+190→586
算式:(586-190)÷3-23
=369÷3-23
=132-23
=109
3.?→÷23→÷13→-51→34
算式:(34+51)x13x23
=85x13x23
=25415
4.?→-9→x9→+9→÷9→9
算式:(9x9-9)÷9+9
=72÷9+9
=8+9
=17递等式计算,能巧算的要巧算:
1.(80800-900)÷425
=79900÷425
=188
2.(1850+1690)÷(47+12)
=3540÷59
=60
3. 72x125
=9x8x125
=9x(8x125)
=9x1000
=9000
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