29×12+29×13+29×25+29×10= .
计算下面各题.+×15 (+)×(1﹣)(+)÷ ×9.3+9.3×2.25.
计算下面各题,能简算的要简算17.8﹣8.75+2.2﹣1.250.125×32×2.5++++( ﹣)
脱式计算.(1)×÷ (2)26.78÷1.3×3.79(3)(+﹣)×36 (4)÷(+)×.
.
灵活计算,(能简便计算的要用简便方法计算).2﹣÷36×(+)(+÷6)×22.1﹣4.88﹣4.12.