我要10道递等式计算题...0.64×25×7.8+2.2 2÷2.5+2.5÷2 194-64.8÷1.8×0.9 36.72÷4.25×9.9 5180-705×6 24÷2.4-2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189)
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![我要10道递等式计算题...0.64×25×7.8+2.2 2÷2.5+2.5÷2 194-64.8÷1.8×0.9 36.72÷4.25×9.9 5180-705×6 24÷2.4-2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189)](/uploads/image/z/198644-68-4.jpg?t=%E6%88%91%E8%A6%8110%E9%81%93%E9%80%92%E7%AD%89%E5%BC%8F%E8%AE%A1%E7%AE%97%E9%A2%98...0.64%C3%9725%C3%977.8%2B2.2+2%C3%B72.5%2B2.5%C3%B72+194%EF%BC%8D64.8%C3%B71.8%C3%970.9+36.72%C3%B74.25%C3%979.9+5180%EF%BC%8D705%C3%976+24%C3%B72.4%EF%BC%8D2.5%C3%970.8+%284121%2B2389%29%C3%B77+671%C3%9715-974+469%C3%9712%2B1492+405%C3%97%283213-3189%29)
我要10道递等式计算题...0.64×25×7.8+2.2 2÷2.5+2.5÷2 194-64.8÷1.8×0.9 36.72÷4.25×9.9 5180-705×6 24÷2.4-2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189)
我要10道递等式计算题...
0.64×25×7.8+2.2
2÷2.5+2.5÷2
194-64.8÷1.8×0.9
36.72÷4.25×9.9
5180-705×6
24÷2.4-2.5×0.8
(4121+2389)÷7
671×15-974
469×12+1492
405×(3213-3189)
我要10道递等式计算题...0.64×25×7.8+2.2 2÷2.5+2.5÷2 194-64.8÷1.8×0.9 36.72÷4.25×9.9 5180-705×6 24÷2.4-2.5×0.8 (4121+2389)÷7 671×15-974 469×12+1492 405×(3213-3189)
问题补充:0.64×25×7.8+2.2
=0.16*4*25*7.8+2.2
=0.16*100*7.8+2.2
=16*7.8+2.2
=127
2÷2.5+2.5÷2
=4/5+5/4
=2.05
194-64.8÷1.8×0.9
=194-36*0.9
=194-32.4
=161.6
36.72÷4.25×9.9
=8.64*9.9
=85.536
5180-705×6
=5180-4230
=950
24÷2.4-2.5×0.8
=10-2
=8
(4121+2389)÷7
=6510/7
=930
671×15-974
=10065-974
=9091
469×12+1492
=5628+1492
=7120
405×(3213-3189)
=405*24
=9720
题目呢?
1.原式=16/25*25*39/5+2.2
=16*39/5+2.2
=127
2.原式=2÷5/2+5/2*1/2
=4/5+5/4
=0.8+1.25
=2.05
3.原式=194-64.8÷(1.8÷0.9)
=194-32.4
=16...
全部展开
1.原式=16/25*25*39/5+2.2
=16*39/5+2.2
=127
2.原式=2÷5/2+5/2*1/2
=4/5+5/4
=0.8+1.25
=2.05
3.原式=194-64.8÷(1.8÷0.9)
=194-32.4
=161.6
4.原式=36.72÷17/4*9.9
=36.72*4/17*9.9
=8.64*9.9
=85.536
5.原式=5180-4230
=950
6.原式=10-2
=8
7.原式=6510÷7
=930
8.原式=10065-974
=9091
9.原式=5628+1492
=7120
10.原式=405*24
=9720
以后不懂得都可以问我!!
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1、0.64*25*7.8+2.2
=4*25*.16*7.8+2.2
=100*.16*7.8+2.2
=16*7.8+2.2
=124.8+2.2
127
2、2/2.5+2.5/2
=.8+1.25
=2.05
3、