(1)
+4.25+3.7+13 10
3 4
=
+3.7+4.25+13 10
3 4
=(
+3.7)+(4.25+13 10
)3 4
=4+6
=10;
(2)0.125×3.2×25
=0.125×8×0.4×25
=(0.125×8)×(0.4×25)
=1×10
=10;
(3)
×44+54×1 7
1 7
=
×(44+54)1 7
=
×981 7
=14;
(4)7.8÷〔32×(1-
)+3.6〕5 8
=7.8÷〔32×
+3.6〕3 8
=7.8÷〔12+3.6〕
=7.8÷15.6
=0.5;
(5)
÷〔5 6
×(3 4
-7 9
)〕1 3
=
÷〔5 6
×3 4
〕4 9
=
÷5 6
1 3
=2.5.