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Words and Rules to Know
Nine cards on the chapter's terms and its four Remember boxes.
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The student works the chapter's own end-of-chapter questions unaided and knows where the remaining practice lives.
Preview · progress not saved — Chapter 1 is free
Nine cards on the chapter's terms and its four Remember boxes.
Ten things to tick off before the test.
The five printed multiple choice questions, in rising difficulty.
When we add 100 to 9,136, the digit at which place increases by 1?
Brain Teasers questions 2 and 7.
Solve and Fill In
Take a moment to solve these Brain Teaser questions on paper, then type your answers below.
Don't forget to write your answer with commas.
Make sure you align the numbers in columns by place value before subtracting.
Be careful when borrowing across a run of zeros!
Think about the order property of addition.
What needs to be taken away from 18 thousands to leave 8 thousands?
Brain Teasers questions 3, 5 and 6, in ordered steps.
The Three Puzzlers
Apply the rules you've learned to solve these trickier problems from the Brain Teasers.
Remember from Unit 1: you cannot start a number with a 0.
First write the correct number, then set up the subtraction.
Which operation do you use to find the smaller number when you know the greater one and the difference?
Brain Teasers question 4, as printed.
The Magic Square
You are given a 3 by 3 magic square. Use the numbers from 1 to 9 only once and complete it so that every row and every column adds up to 15. The square starts with a 4 in the top-left, a 3 in the middle-left, a 5 in the center, and a 1 somewhere at the bottom.
Type the three numbers separated by commas.
A good strategy is to look for a row, column, or diagonal that already has two numbers given.
Optional: Write down a rule you discovered.
The Value Based Question from page 31, all three parts.
Helping Krishna
Amol, Deepak, and Krishna were good friends. Krishna was very poor and was not able to buy new books and a new uniform. Amol and Deepak spoke to their parents and gave ₹ 1,250 and ₹ 1,075 to Krishna.
Note: Don't forget to practice the other problems in Worksheets 1 to 8!
Add the two amounts together.
This is a two-step problem. Use your answer from question 1.
There is no right or wrong answer here. Write about your own experience.