2×6= 4×6= 8×6= 2×4= 4×4= 8×4=
4减去3与的积,再除以10,商是多少?
甲数是70,比乙数大25,乙数是丙数的,求丙数.
计算题 5﹣x=32:5=0.75:x 614115﹣517440÷168(3.3×6.3×0.6)÷(1.8+2.7×1.9) 18﹣2÷(3+1)×20 2.74﹣0.56×(2﹣1+2.275)
简算题 12.88+7+4+; 7.6×7.6+7.6×1+7.6.
口算题 25.8+0.42= 0.4×0.004= 125×8= 287+179+﹣187= 999+99+3=(﹣0.02)÷1+=