学校跑道长400米,小明跑了5圈,跑了多少米?合多少千米?
列竖式计算,打★的要验算.93×84= 920÷4= 4.68+9.5=4.1﹣2.73= 48×25= 验算★538÷5=
用竖式计算.134×24= 407×45=6.35+7.8= 9.2﹣5.41=
看谁算得又对又快.50×60= 13×30= 11×50= 41×20=600×70= 125×8= 33×11= 0×25=2.5﹣1.6= 150×6= 95÷5= 5.8+4.8=
口算:560+0= 96﹣96= 920×0= 5×2=25×4= 125×8= 27÷3×7= 3×6÷9=45+8﹣23= 8+0.2= 3.5+4.5= 1.3﹣0.7=
口算560+0= 5×2= 3×6= 8+0.2=96﹣96= 25×4= 27÷3×7= 3.5+4.5=920×0= 125×8= 45+8﹣23= 1.3﹣0.7=