Negative numbers without the guesswork. Every problem is worked on the number line and with
counters, with a reason for every sign: add, subtract, multiply and divide integers, find absolute values,
and put numbers in order.
Make a problem for me — pick what goes in it
Try
Your answer
The work
(−3) a negative number
− minus: subtract
+ counter worth +1
− counter worth −1
→ jump right
← jump left
Say it out loud
Every sign gets a reason. Need the arithmetic of the sizes? Work it on
+, −,
× or ÷. Long problems that mix
× ÷ with + − go on the Order Stack.