用计算器计算练习1.11081 2170 503745 159 99 12 92106 2032.1111111101 2222222202 3333333303 4444444404 5555555505 99999999093. (1)599999+49999+3999+299+19=600000-1+50000-1+4000-1+300-1+20-1=654320-5=654315 (2)6999999+699999+69999+6999+699+69=7000000-1+700000-1+70000-1+7000-1+700-1+70-1=7777770-6=77777644.苹果:960÷80=12(千克/箱) 桃:960÷30=32(千克/箱) 梨:960÷60=16(千克/箱)桃子最重 苹果最轻5.35×12+126×9+49×21+38×12=3039(元)答:购进这批玩具一共用去3039元。6.471471÷7= |