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 55+37= 80﹣26= 1400﹣800= 2+210= 9+300= 82+0= 1﹣= += ﹣= .
口算我最棒.+= += ﹣= ﹣=+= 1+= ﹣0.2= +0.3=+= 1﹣+= ﹣﹣= ++=
= = = =0.32= = = == 2x+x=
240﹣40÷4= 125×(8+8)= ÷12=6 2000×3+60=320×11÷32= 1﹣= 24×5﹣25×4= 8×13×25=4005÷19≈