[1–(
+
)]÷
–
×
÷3
–(
+
)
×
–
25÷(
–
)
+
–
(
–
)÷(
+
) [1–(
+
)]÷3.5
[(1–
)×
]÷4
+
+
(1–
×
)÷
[(1–
)×
]÷4


×
+
÷
12×103-4500÷75
×[
÷(
×
)]
(
+
)×15×11 37.5+19.5÷(2.5×4)
(
×
+
)÷
÷[(
+
)×
]
2881÷43
=(1290+1591)÷434
=1290÷43+1591÷43
=30+37
=67( )
14.8×6.3-6.3×6.5+8.3×3.7
=(14.8-6.5)×6.3+8.3×3.7
="8.3×6.3+8.3×3.7"
8.3×(6.3+3.7)
=8.3×10
=83( )
(1÷1-1)÷5.1
=(1-1)÷5.1
=0÷5.1
=0( )
18.1+(3-0.299÷0.23)×1
=18.1+1.6×1
=18.1+1.6
=19.7( )
(80-9.8)×
-1.32
=70.2×
-1.32
=28.08-1.32
=26.76( )
45.55-(6.82+15.55) 34.52-17.87-12.23
2.5×(1.92÷0.3-5.9) 24.5-(7.58+
)
7.5-2.45+7.5+2.45 (
-
)×21+
5.09-(0.09+1.23) 9.36-(4.36-3.5)
14.8×6.3-6.3×6.5+8.3×3.7 18.1+(3-0.299÷0.23)×1
(
)÷
20-[(
19175÷59+678 36.5×1.4-8.51
1.3-3.79+9.7-6.21 8×0.4×12.5×2.5
125×(8+0.8+0.08) 45÷〔78-(25+38)
3.35×6.4×2+6.7×3.6 18.7-3.375-6.625
2.5×4.4 25×1.25×32
(3.75+4.1+2.35)×9.8 1.28+9.8+7.72+10.2