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add dec
sub dec
solving equations
100
3.67+2.5
What is 6.17
100
2.0-3.4
What is 1.4
100
x=2+3
What is x=5
200
12.8+4.3
What is 17.1
200
12.0-6.0
What is 6.0
300
34.7+3.0
What is 37.7
300
34.-12.
What is 22.
400
34.5+12.0
What is 46.5
500
345.78+23.6
What is 369.38