500 oral arithmetic problems in grade four of primary school

500 oral arithmetic problems in grade four of primary school

500 fourth grade oral arithmetic 138-89 = 5400 / 54 = 200 × 34 = 550-450 = 18000 / 600 = 2700 / 30 = 45 × 14 = 180000 + 240000 = 89 / 100 = 0.82 + 0.08 = 73 × 1 =