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PARTIAL SUMS ADDITION 483 +265 THINK HOW MANY PARTS?? (The largest number has 3 digits so there will be 3 parts.) WORK LEFT TO RIGHT…ADD THE COLUMNS.

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Presentation on theme: "PARTIAL SUMS ADDITION 483 +265 THINK HOW MANY PARTS?? (The largest number has 3 digits so there will be 3 parts.) WORK LEFT TO RIGHT…ADD THE COLUMNS."— Presentation transcript:

1 PARTIAL SUMS ADDITION THINK HOW MANY PARTS?? (The largest number has 3 digits so there will be 3 parts.) WORK LEFT TO RIGHT…ADD THE COLUMNS

2 PARTIAL SUMS ADDITION THINK HOW MANY PARTS?? (The largest number has 3 digits so there will be 3 parts.) WORK LEFT TO RIGHT…ADD THE COLUMNS STEP1: ADD 400… …

3 PARTIAL SUMS ADDITION THINK HOW MANY PARTS?? (The largest number has 3 digits so there will be 3 parts.) WORK LEFT TO RIGHT…ADD THE COLUMNS STEP 1: ADD 400… … STEP 2: ADD 80… …

4 PARTIAL SUMS ADDITION THINK HOW MANY PARTS?? (The largest number has 3 digits so there will be 3 parts.) WORK LEFT TO RIGHT…ADD THE COLUMNS STEP 1: ADD 400… … STEP 2: ADD 80… … STEP 3: ADD 3… …

5 PARTIAL SUMS ADDITION THINK HOW MANY PARTS?? (The largest number has 3 digits so there will be 3 parts.) WORK LEFT TO RIGHT…ADD THE COLUMNS STEP 1: ADD 400… … STEP 2: ADD 80… … STEP 3: ADD 3… … FINAL STEP: ADD

6 TRADE-FIRST SUBTRACTION THINK HOW MANY STEPS BEFORE YOU SUBTRACT? (The largest number has 3 digits so there will be 3 steps.) WORK LEFT TO RIGHT…TRADE STEP 1: TRADE? Can you remove 2 hundreds from 4 hundreds? YES!

7 TRADE-FIRST SUBTRACTION THINK HOW MANY STEPS BEFORE YOU SUBTRACT? (The largest number has 3 digits so there will be 3 steps.) STEP 2: TRADE? WORK LEFT TO RIGHT…TRADE STEP 1: TRADE? Can you take 2 hundreds from 4 hundreds? YES! Can you take 7 tens from 6 tens? NO! TRADE!

8 TRADE-FIRST SUBTRACTION THINK HOW MANY STEPS BEFORE YOU SUBTRACT? (The largest number has 3 digits so there will be 3 steps.) STEP 2: TRADE? WORK LEFT TO RIGHT…TRADE STEP 1: TRADE? Can you take 2 hundreds from 4 hundreds? YES! Can you take 7 tens from 6 tens? NO! TRADE! STEP 3: TRADE? Can you take 8 from 3? NO! TRADE!

9 TRADE-FIRST SUBTRACTION THINK HOW MANY STEPS BEFORE YOU SUBTRACT? (The largest number has 3 digits so there will be 3 steps.) STEP 2: TRADE? WORK LEFT TO RIGHT…TRADE STEP 1: TRADE? Can you take 2 hundreds from 4 hundreds? YES! Can you take 7 tens from 6 tens? NO! TRADE! STEP 3: TRADE? Can you take 8 from 3? NO! TRADE! STEP 4: SUBTRACT

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