3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5
7.325-3.29-3.325 7.325-(5.325+1.7)
3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8
0.25×0.28 0.25×4÷0.25×4 3.5×101-3.5 3.5×2.7-3.5×0.7 4.9÷3.5 1) 51-4.5=(51-10X)×3 (4) X÷25+X÷5=X-19
0.125×3.2×2.5 3.5×9.9 3.5×9.9+3.5×0.1 (32+5.6)÷0.8 7÷0.25÷4 (2) 3X-2×(10-X)=15 35×40.2
3.5×99+3.5
3.5×2.7+35×0.73
3.5÷0.6-0.5÷0.6
7÷0.125
(3) (1-X)÷3=2-X
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