a) (23.37-11.37):37
=(23-11).37:37
=12.(37:37)
=12.1
=12
b)91.172+91.13-91.85
=91.(172+13-85)
=91.100
=9100
a, ( 23 × 37 - 11 × 37 ) ÷ 37
= 37 × ( 23 - 11 ) ÷ 37
= 37 × 12 ÷ 37
= 444 ÷ 37
= 12
b, 91 × 172 + 91 × 13 - 91 × 85
= 91 × ( 172 + 13 - 85 )
= 91 × 100
= 91000
a) (23.37-11.37):37
=(23-11).37:37
=12.(37:37)
=12.1
=12
b)91.172+91.13-91.85
=91.(172+13-85)
=91.100
=9100
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