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
3.7-0.7=
5.2+6.8=
90×70=
400÷50=
0.35+1.25=
12.5-2.5+7.5=
12-2.5=
28÷7×3=
150×4=
24×5=
840÷21=
458-199=
27+54÷6=
98-8×6=
(34+26)×30=
34×(45-45)÷43=
105-105÷15=
350÷7-240÷6=
+42=80 -35=63 20×=160
2.3×6= 6.5÷0.01= 0.36÷0.4= +=
0.82= 1.2×= -= 4.3÷2.5÷4=
7.15﹣1.5= +0.25=