(1)
×5.25+3.75÷8+1 8
,1 8
=
×5.25+3.75×1 8
+1 8
,1 8
=(5.25+3.75+1)×
,1 8
=10×
,1 8
=1.25;
(2)
+94 5
+994 5
+9994 5
+99994 5
,4 5
=(
+1 5
+1 5
+1 5
)+91 5
+994 5
+9994 5
+99994 5
,4 5
=(9
+4 5
)+(991 5
+4 5
)+(9991 5
+4 5
)+(99991 5
+4 5
),1 5
=10+100+1000+10000,
=11110.