请问 3.07 ×101-3.07 4.56+7分之3+4.44+7分之4 1.25 ×3.2 ×2.5 【(9+0.25) ×12】/30
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![请问 3.07 ×101-3.07 4.56+7分之3+4.44+7分之4 1.25 ×3.2 ×2.5 【(9+0.25) ×12】/30](/uploads/image/z/142715-11-5.jpg?t=%E8%AF%B7%E9%97%AE+3.07+%C3%97101-3.07+4.56%2B7%E5%88%86%E4%B9%8B3%2B4.44%2B7%E5%88%86%E4%B9%8B4+1.25+%C3%973.2+%C3%972.5+%E3%80%90%EF%BC%889%2B0.25%EF%BC%89+%C3%9712%E3%80%91%2F30)
请问 3.07 ×101-3.07 4.56+7分之3+4.44+7分之4 1.25 ×3.2 ×2.5 【(9+0.25) ×12】/30
请问 3.07 ×101-3.07 4.56+7分之3+4.44+7分之4 1.25 ×3.2 ×2.5 【(9+0.25) ×12】/30
请问 3.07 ×101-3.07 4.56+7分之3+4.44+7分之4 1.25 ×3.2 ×2.5 【(9+0.25) ×12】/30
3.07 ×101-3.07
=3.07×(101-1)
=3.07×100
=307
4.56+7分之3+4.44+7分之4
=(4.56+4.44)+(7分之3+7分之4)
=9+1
=10
1.25 ×3.2 ×2.5
=1.25×0.8×4×2.5
=(1.25×0.8)×(4×2.5)
=1×10
=10
【(9+0.25) ×12】/30
=【9.25×12】/30
=9.25×(12/30)
=9.25×(2/5)
=3.7
3.07 ×101-3.07
=3.07×(101-1)
=3.07×100
=307
4.56+7分之3+4.44+7分之4
=4.56+4.44+3/7+4/7
=9+1
=10
1.25 ×3.2 ×2.5
=1.25×8×0.4×2.5
=10×1
=10
【(9+0.25) ×12】/30
=(9+0.25)×0.4
=9×0.4+0.25×0.4
=3.6+0.1
=3.7
3.07 ×101-3.07=(3.07x100)+(3.07-3.07)=307
4.56+3/7+4.44+4/7=(4.56+4.44)+(3/7+4/7)=9+1=10
1.25 ×3.2 ×2.5=(1.25x0.8)x(4x2.5)=1x10=10
[(9+0.25) ×12]/30=(9+1/4)x(12÷30)=(9+1/4)x4/10=36/10+1/10=37/10=3.7