4×4.38×2.5
34.8-(14.8+3.4)
1.87+1.87×99
2.21+3.7+0.79+6.3
39×88+88×61
56×25×4
20×[840÷(36-8)]
3.8+5.46+2.2
2.8×0.5+0.1×2.8
0.25×7.9×0.4
8.56×101-8.56
①836-192÷8×16
②1.4÷(1.4+0.7)
③0.8×0.4×12.5×0.25
④ ÷6+ ÷20
⑤14×19×( + )
⑥ ÷[( + )÷ ]