①5.42+7.26+4.58+2.74
②66.78-5.65-4.35
③157×45+43×45
④8×(27×125)
⑤36.28+18.69-6.28
15×7×4 25×19×4 2×23×50 88×125
28×25 125×72
16×2×50 8×57×125
25×277×4 8×25×125×4
①78×134+66×78
②3600÷45÷2
③3.6+5.31+6.4+5.69
④125×64×8
⑤78.12-0.76-0.24
⑥600-(504-216)÷24