Addition and Estimating Sums

Estimate the sum of 432 and 567 by rounding to the nearest hundred.

• 900

• 1100

• 800

• 1000

If Jon has 345 marbles and Malone gives him 278 more, how many marbles does John have in total?

• 543

• 567

• 623

• 489

Jameson has 432 Pokémon cards and then he buys 567 more. How many cards does he have in total?

• B) 899

• C) 1100

• A) 1000

• A) 999

What is the sum of 2,345 and 6,789?

• 9,134

• 9,133

• 9,131

• 9,132

Find the total when 523 and 367 are added together.

• 456

• 890

• 8900

• 1000

Use mental math to solve.

120 + 42 + 80

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James have 90 marshmallows in the jar. He adds 382 more. How many marshmallows are now in the jar? 

• 472

• 289

• 340

• 198

Find the total when 523 and 367 are added together.

• 456

• 890

• 8900

• 1000

679

+56

• 61215

• 635

• 4635

• 345

• 735

Juan has 253 marbles. Ella has 38 more marbles than Juan. How many marbles does Ella have? Ella has _____ marbles.