Let’s go through each problem one by one. We’re adding and subtracting integers — that means positive and negative numbers. Remember:
- Subtracting a negative is like adding a positive:
Example: \( (+5) - (-3) = +5 + 3 = +8 \)
- Adding two negatives gives a more negative number:
Example: \( (-4) + (-6) = -10 \)
- Adding a positive and a negative? Think of it as “taking away” or “moving on a number line.”
Example: \( (+7) + (-3) = +4 \)
Now let’s solve each problem carefully.
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Left Column:
1. \( (+90) - (-70) = +90 + 70 = +160 \)
✔
2. \( (+1) + (+90) = +91 \)
✔
3. \( (-96) + (-86) = - (96 + 86) = -182 \)
✔
4. \( (-86) - (-10) = -86 + 10 = -76 \)
✔
5. \( (+79) - (+35) = 79 - 35 = +44 \)
✔
6. \( (-71) + (-3) = - (71 + 3) = -74 \)
✔
7. \( (-71) - (-85) = -71 + 85 = +14 \)
✔
8. \( (-43) - (-99) = -43 + 99 = +56 \)
✔
9. \( (+93) + (-10) = 93 - 10 = +83 \)
✔
10. \( (+90) + (-97) = 90 - 97 = -7 \)
✔
11. \( (+90) - (-1) = +90 + 1 = +91 \)
✔
12. \( (-83) + (-95) = - (83 + 95) = -178 \)
✔
13. \( (-71) + (-99) = - (71 + 99) = -170 \)
✔
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Right Column:
1. \( (-81) - (+71) = -81 - 71 = -152 \)
✔
2. \( (-98) + (-90) = - (98 + 90) = -188 \)
✔
3. \( (-79) + (+94) = 94 - 79 = +15 \)
✔
4. \( (+92) + (+84) = 92 + 84 = +176 \)
✔
5. \( (+77) + (-98) = 77 - 98 = -21 \)
✔
6. \( (-84) + (+85) = 85 - 84 = +1 \)
✔
7. \( (+83) + (+85) = 83 + 85 = +168 \)
✔
8. \( (+60) - (-80) = 60 + 80 = +140 \)
✔
9. \( (-87) + (-73) = - (87 + 73) = -160 \)
✔
10. \( (-96) - (-98) = -96 + 98 = +2 \)
✔
11. \( (+76) - (+74) = 76 - 74 = +2 \)
✔
12. \( (+48) - (-90) = 48 + 90 = +138 \)
✔
All answers match the green ones in the original sheet — so they are correct!
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Final Answer:
(+90) − (−70) = (+160)
(+1) + (+90) = (+91)
(−96) + (−86) = (−182)
(−86) − (−10) = (−76)
(+79) − (+35) = (+44)
(−71) + (−3) = (−74)
(−71) − (−85) = (+14)
(−43) − (−99) = (+56)
(+93) + (−10) = (+83)
(+90) + (−97) = (−7)
(+90) − (−1) = (+91)
(−83) + (−95) = (−178)
(−71) + (−99) = (−170)
(−81) − (+71) = (−152)
(−98) + (−90) = (−188)
(−79) + (+94) = (+15)
(+92) + (+84) = (+176)
(+77) + (−98) = (−21)
(−84) + (+85) = (+1)
(+83) + (+85) = (+168)
(+60) − (−80) = (+140)
(−87) + (−73) = (−160)
(−96) − (−98) = (+2)
(+76) − (+74) = (+2)
(+48) − (−90) = (+138)
Parent Tip: Review the logic above to help your child master the concept of math drills adding and subtracting integers worksheet a.
