计算题:13.92﹣(1.19+9.92)﹣2.81; (+﹣)×30; 3.5×[6.8﹣(1.6+3.6÷0.9)]÷84; 55×66÷(11×11); ×[÷(×)]; (+)÷(÷4﹣).
填一填
□﹢76=154 52×□=2236 1365÷□=65 901﹣□=723 □÷30=270 □﹣452=452.
填表.
求横线中的数,并写出计算过程. (1) ×39=2418 (2) ÷26=26 (3) ﹣515=245 (4)72× =360 (5) +192=321 (6)5330÷ =65.
看图写算式. × = ÷ = ÷ = .