6.38×100= 0.96-0.57= 5.4+1.35= 8.4-3.6=
5.6÷10= 3.98+5.8= 15-2.4= 6.9+7.8=
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