五年级下册数学-口算天天练 北师大版（无答案）

口算训练 + = ÷ = × = - = + = + = + = + = + = + = ÷ = × = - = 1 + = 2.5×4= 1.25×80= 1÷ = × = ÷ = [来源:学,科,网Z,X,X,K] ÷ = ÷ = ÷ = ÷ = × = 4 ÷ = × 17 = 10 × = × 12 = ×8= ×12= 8×1.25= 99×17= 1÷0.25= 14÷ = ×5= 1÷ = 25× = 30× = × = 5X+ X= n + n= - = m- m= + = ÷ = + = ÷ = ÷ = × = - - = + = ÷ = - = - = + = ÷ = ÷ = + = × = [来源:学|科|网] [来源:学,科,网Z,X,X,K] [来源:学_科_网Z_X_X_K] [来源:学科网ZXXK] $$