估一估,连一连.
脱式计算(能箭算的要箭算)6.5×8+3.5×8﹣44 138×99 (999+111)÷[56×(﹣)](1.9+1.9+1.9+1.9)×2.5 [2﹣(11.9﹣8.4×1)]÷1.3.
脱式计算.3.7×99+3.7 9.6﹣11÷7+×4 12×(+﹣)
9.744÷2.4﹣2.4×0.5.
×1.67+0.33× 999×667+667.
计算:(1)19175÷59+678(2)36.5×1.4﹣8.51÷3.7(3)4+4÷3×1(4)4.6×+0.6×3.4+2×(5)[1+(2﹣0.35)×]÷12.